Why do terpenoids matter in their ganja garden?

High-performance medical marijuana gardeners have been hearing a lot about terpenoids lately. Terpenoids are responsible for the various aromas found in cannabis. Curious growers who dig into the subject, however, can quickly find themselves lost in a world of chemistry jargon. While all the science is interesting, what people really want to know is, "why do terpenoids matter in their ganja garden?"